Cello Joining Clamp Set of 4 Stainless Rods

There are 4 clamps in this set with the following opening dimensions: Miniumum to Maximum Clamp #1 14 1/2" - 17 3/4" Clamp #2 12 3/4" - 16" Clamp #3 11" - 14 1/2" Clamp #4 6 3/4" - 9 3/4"